/**
 * 日期格式化
 * @param {(Object|string|number)} time 时间可以是字符串，时间戳，date格式等
 * @param {string} pattern 格式 默认{y}-{m}-{d} {h}:{i}:{s}
 * @returns
 */
export function parseTime(time, pattern) {
  if (arguments.length === 0 || !time) {
    return null;
  }
  const format = pattern || '{y}-{m}-{d} {h}:{i}:{s}';
  let date;
  if (typeof time === 'object') {
    date = time;
  } else {
    if (typeof time === 'string' && /^[0-9]+$/.test(time)) {
      time = parseInt(time);
    } else if (typeof time === 'string') {
      time = time.replace(new RegExp(/-/gm), '/');
    }
    if (typeof time === 'number' && time.toString().length === 10) {
      time = time * 1000;
    }
    date = new Date(time);
  }
  const formatObj = {
    y: date.getFullYear(),
    m: date.getMonth() + 1,
    d: date.getDate(),
    h: date.getHours(),
    i: date.getMinutes(),
    s: date.getSeconds(),
    a: date.getDay()
  };
  const time_str = format.replace(/{(y|m|d|h|i|s|a)+}/g, (result, key) => {
    let value = formatObj[key];
    // Note: getDay() returns 0 on Sunday
    if (key === 'a') {
      return ['日', '一', '二', '三', '四', '五', '六'][value];
    }
    if (result.length > 0 && value < 10) {
      value = '0' + value;
    }
    return value || 0;
  });
  return time_str;
}

/**
 * 类型判断
 * @param {*} value
 * @returns string,number,boolean,undefined,null,symbol,object,array,function,regExp,date
 */
function getType(value) {
  return Object.prototype.toString
    .call(value)
    .match(/\s+(\w+)/)[1]
    .toLowerCase();
}

export default {
  install(Vue) {
    Vue.prototype.parseTime = parseTime;
    Vue.prototype.getType = getType;
  }
};
